Walk into any jewelry store and you will hear about the 4Cs. The idea is simple: four factors, cut, color, clarity and carat weight, combine to describe a finished diamond's quality, and each one affects the price on its own. The trouble is that a report full of letters and numbers does not tell you which grades you will notice and which you are paying extra for. At Forever Jewelry in Greenwood Park Mall we show diamonds to local couples every week, so this guide focuses on what shows up to the eye as well as what shows up on paper.
If you are still deciding on the overall style, start with our engagement ring shopping guide, then come back here to read the grades.
The 4Cs, one at a time
Cut
Cut is about proportions and finish, not shape. It controls how well the diamond returns light, which is what we call sparkle. GIA grades cut on a five-step scale, Excellent, Very Good, Good, Fair and Poor, but only for round brilliant diamonds. Other shapes such as oval, pear and cushion are evaluated for polish and symmetry without an overall cut grade, so for those you need to judge the stone with your own eyes.
Color
GIA grades color from D, which is colorless, to Z, which is light yellow or brown. Truly colorless diamonds are scarce, and most diamonds carry a slight tint. The scale measures how much color is absent, so the highest-priced stones are the most colorless ones.
Clarity
Clarity describes internal characteristics (inclusions) and surface marks (blemishes). GIA's scale has 11 grades: Flawless, Internally Flawless, VVS1 and VVS2, VS1 and VS2, SI1 and SI2, and I1, I2 and I3. GIA notes that most diamonds in jewelry stores fall between VS and SI, and that many of those characteristics will likely not be visible to the naked eye.
Carat
Carat is weight, not size. One metric carat is two-tenths of a gram, divided into 100 points, so a 0.75-carat stone is 75 points. Larger stones are rarer, so price per carat climbs as weight increases, and the jump can be steep at familiar milestones such as one carat.
Which grades you can actually see
Cut is the grade people notice first, because a poorly cut stone looks dull even when the color and clarity are high. That is why many jewelers suggest putting cut first and then balancing the other three. A diamond with a strong cut and a modest color or clarity grade will usually look livelier than a poorly cut stone with higher grades.
For color and clarity, the answer depends on the stone and the setting. A slight tint is easier to spot in a platinum or white gold setting than in yellow gold, which tends to warm the look of the diamond. Clarity grades in the VS and SI range often look clean from normal viewing distance, but it varies by diamond, and the type and position of an inclusion matter as much as the grade. Two stones with the same grade can look different, so this is where seeing the stone in person pays off.
One more detail: the setting changes how a diamond reads. Our engagement ring settings guide explains how prongs, bezels and halos show off or frame the center stone.
Where to spend and where to save
- Protect the cut. If you are choosing a round brilliant, an Excellent or Very Good cut grade is a sensible place to start. For other shapes, compare stones side by side.
- Pick a color that suits the metal. You do not need the top of the scale to get a bright, white look in a finished ring, especially in yellow or rose gold.
- Choose clarity by eye, not by label. Look for a stone that appears clean to you, rather than paying for a grade you cannot see.
- Set carat last. Once cut, color and clarity are in range, use what is left of the budget on size. A slightly smaller stone just under a milestone weight can look nearly identical for less.
The same four factors describe lab-grown diamonds, so you can compare them with natural stones grade for grade. See our lab-grown vs. natural diamond comparison if you are weighing both.
Plan the purchase, not just the diamond
If you are shopping for a winter proposal, remember that choosing the diamond is only one step. Setting, sizing and any custom work add time, which is why we lay out the schedule in our holiday engagement ring timeline. Forever Jewelry also offers several financing options, so ask us about financing while you set the budget. You can read the basics in our jewelry financing options guide.
Greenwood Park Mall, Space H02B
1251 US Highway 31 North, Greenwood, Indiana 46142
Phone: (317) 430-8184 · Web: www.forever.jewelry
Serving Greenwood, Indianapolis, Center Grove & all of Johnson County. In business since 2006.
Frequently asked questions
What are the 4Cs of a diamond?
The 4Cs are cut, color, clarity and carat weight. Together they describe a finished diamond's quality, and each affects price independently. Cut governs how well the diamond handles light, color measures how colorless it is, clarity describes internal and surface characteristics, and carat is its weight.
Which of the 4Cs is most important?
Many jewelers advise prioritizing cut, because it determines how much a diamond sparkles. After that, choose the balance of color, clarity and carat weight that fits your budget and what you can see with the naked eye. A well-cut diamond with a modest grade can look better than a poorly cut one with higher grades.
What diamond clarity is eye-clean?
There is no single grade that guarantees it. GIA notes that most diamonds in jewelry stores fall between VS and SI clarity, and that many of those characteristics will likely not be visible to the naked eye. The exact diamond matters more than the grade, so look at it in person.
What is the GIA color scale?
GIA grades diamond color from D, which is colorless, to Z, which is light yellow or brown. Truly colorless diamonds are scarce, and most diamonds show a slight tint. Many shoppers choose from the near-colorless range because the tint is hard to see once the stone is in a setting.
Do lab-grown diamonds use the same 4Cs?
Yes. Lab-grown and natural diamonds are described with the same four factors, so you can compare grades side by side. Our lab-grown vs. natural comparison covers how the choice changes the budget.
Where can I look at diamonds in person near Greenwood, Indiana?
Forever Jewelry at Greenwood Park Mall, Space H02B, 1251 US Highway 31 North, Greenwood, Indiana has helped local shoppers since 2006. Stop in to compare diamonds side by side and ask about financing at www.forever.jewelry.
See the difference in person
Stop by Greenwood Park Mall to compare diamonds side by side, or start with our site and ask about custom design and financing.
Visit forever.jewelry Call (317) 430-8184